Oil motor



R. M. GINDER `Ian. 23, 1962 OIL MOTOR Filed March l, 1960 NWN.

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3,017,868 OILMOTOR Raymond M. Ginder, 1218 N. 9th St., Salina, Kans. Filed Mar. 1, 1960, Ser. No. 12,204 4 Claims. (Cl. 121-164) e An additional object of the invention is the' provision' of a simplified oil motor of this character wherein yoil` flowing continuously through a series of valves reciprocates a shaft provided with a double pistoncontinuously,`

in such manner as to impart a reciprocatory movement to the apparatus driven by the shaft.

An additional object of the invention is the provision` of a device of this character which is sturdy and durable in construction, reliable and etilc'zien'tin" operation, and

relatively simple and inexpensive toV manufacture, assemble and utilize. y

`Other objects will in'part be obviousV and in'part be pointed out"as the description of the invention proceeds, and shown in the accompanying drawing, where-in:

FIGURE ll is a longitudinal transversesectional View' taken through one form of'pump or'rn'otor'ernbodying the elements of the instant invention; and' FIGURE 2 is a 'sectional view taken substantially along" the line2-2 of FIGURE l as viewed in the direction in dicated by theV arrows.

Having reference now to the drawing in detail, the oil. motor of the instant invention generally indicated at 10 consists of a tubular section 11, which is threaded as at. 12, aligned with a second tubular section 13 externally4 threaded as at 14. The sections are connected by means of an internally threaded sleeve 15, which is provided.

with a flatupper portion 16' and a flattened opposed or lower portion v1'7. The sleeve is provided with a Vpair of, illustratively, upper ports 18' and 19, which areprovided with reduced endportions 26 and 21, respectively.

The ports 18 andi?l communicate vwith theopposite ends.A

22 and 2 3 of a U-shaped tube 24 positioned interiorly of a block 25 which is secured in any desired manner as bolts 26 to the upper. smooth surface, 16 of the sleeve. An oil inlet nozzle 27 extends through one side, of the block 25 into Vcommunication with the port 'or passage 24, and is supplied withoil' through a pipe 2S, which extends from any suitable oil 4reservoir or source of oil supply; I

Suitableirin'gr seals 29 and 30 seal the junctures of passages 18 and 22 and 19 and 23, respectively.

The opposite attened portion 17 of sleeve 15 has a pair of ports 35 and 36 therein, which communicate with reduced ports 37 and 38, which in turn communicate with the interior of the passage formed by the sections 11 and 13. Ports 35 and 36 in turn communicate with ports 39 and 40 which are located in a lower block 41, which is secured as by means of screws or bolts 42 to the lower smooth surface 17 of sleeve 15. An oil exit 43 extends from passage 40a and communicates with an oil line 44, which returns to the reservoir or source of supply.

Oil rings 45 and 46 seal the juncture of ports 35 and 39 and 36 and 40, respectively.

Interiorly of the tubular member 11-13 is a pisto-n rod 50, which is provided with oppositely disposed pistons l and 52 which carry sealing rings 53 and 54 and which are disposed on opposite sides of a central interior annulus 55 which forms a part of ring 15, and extends into the interior of the passage between the ends of tuce animas Q@ Paitented Jari. 2 3, 1962 2 bular sections 11 and 13. A sealing ring 54 positionedV in a suitable groove 57 engages the periphery of piston rod 50, and formsan oil seal therebetween.

Cushioning springs 58 and 59, respectively, are seated on opposite sides of centralpartition and have their inner ends engaging inturned anges 60 and 61- of opposed upper slide valve members 62 and 63. The ex-y tending ends 60 and 61 are connected by means of a connecting rod 64, so that the slide valves 6 2 and 63 move in unison. Y Lower slide valves 65 and 66 vare .also provided adjacentthe ports 37..-and 38, andl include upturned end portions67 and 68, respectively, which are adapted to be engaged by the inner ends of springs 58 and 59j. Ends 67, and 68 are similarly connected by a connecting pin 70 lsimilar to the connectingV pin y64. Y y

The valves 62, 63, 65 and 66 have all'been described a-s individual valves inorder `to effectively. describe their relationship to ,the various ports. In actuality,.they are all parts of a common Vcup-*shaped member. generally in, dicated at 71, as shown, in FIGURE 2, the cup compris-V ing/aV pair of opposed portions, connected by the rods 55V andm.

It will be noted .that thevalve ports 20 and 21 arefpo-I sitionedfarther apart than the ports 37 and 38, andthe` arrangement issuch th'at'when'the piston 51, for example, engages` the rspring. 58'to movethe valve 62 to *openI positionfthat the ,valve port 37 is closed lby" the ,slideV valyei.` arrangement is thus such that o il enter-` in'gthrough' the port 20 serves to move the piston 51 outwardlyy or awayfromV the centralnpartition .55, vSimul-H` taneouslyin this positionthe port 2 1, is closed, and the exit port 38 is opened sothat on the returnstroke the piston 52 forces oil outwardlythrough the port 38 and through the ,return line 44. When the piston `52 is fmoved into,V

a position to'engage the slidev valves 6-3 andr66 to move them respectively to open Yandclosed position, opening the' port 2.1 and closing the port 3,8, theport k20- will be closed, as shown/in the drawing, and` the port 37 will beopen, whereupon oihowing vthrough the `port 21 will'eagain forcethe piston 52 outwardly, moving thevpiston 51 in wardly, while oil retained in the space between the'ring 55 andthe piston 51 is exited through the port.37,

Thus the reciprocationwill be continued as` long. Vas oil issuppliedtothe device,A and la, safe,` satisfactory and effectivereciprocatory 4movement, will .be imparted to e drive rod 75,.from which the rciprocatory motion may be transmitted to any desired device.A K n n v,From `the foregoingvit will now be seen that .there is herein providedan improved oil motor, which accom-I plishes all o f vthe lobjects of this invention, andhothersln including many advantages of great practical utility and commercial. importance. l v

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, and it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. An oil motor including a tube, a piston rod in said tube, a central partition in said tube sealingly engaging said piston rod, a pair of pistons on said piston rod, one on each side of said partition, a pair of inlet ports on one side of said tube, one on each side of said partition, a pair of diametrically opposed outlet ports on the other side of said tube, one on each side of said partition, a valve member for simultaneously closing the inlet port and opening the outlet port on one side of said partition, a second valve member for simultaneously opening the inlet valve port and closing the outlet port on the other side of said partition, means connecting said valve members, said ports being so arranged that the closure of one inlet port opens the other, and closure of one outlet port opens the other, and vice versa, said valve members being positioned in the path of travel of said pistons, whereby movement of one piston to a position engaging one valve member opens the inlet port and closes the outlet port on that side of said partition and simultaneously closes the inlet port and opens the outlet port on the other side of the partition, reversing the direction of travel of said piston, spring means interposed between said pistons and said valve members, said first and second valve members comprising cup-shaped portions having apertured bases with the piston rod extending through the apertures in said bases, and upstanding flanges, said springs engaging said flanges when engaged by said pistons to move said valve members, an oil supply source, means for continuously supplying oil to said inlet ports, and means returning oil from said outlet ports to said supply source.

2. An oil motor including a tube, a piston rod in said tube, a central partition in said tube sealingly engaging said piston rod, a pair of pistons on said piston rod, one on each side of said partition, a pair of inlet ports on one side of said tube, one on each side of said partition, a pair of diametrically opposed outlet ports on the other side of said tube, one on each side of said partition, a valve member for simultaneously closing the inlet port and opening the outlet port on one side of said partition, a second valve member for simultaneously opening the inlet valve port and closing the outlet port on the other side of said partition, means connecting said valve members, said ports being so arranged that the closure of one inlet port opens the other, and closure of one outlet port opens the other, and vice versa, said valve members being positioned in the path of travel of said pistons, whereby movement of one piston to a position engaging one valve member opens the inlet port and closes the outlet port on that side of said partition and simultaneously closes the inlet port and opens the outlet port on the other side of the partition, reversing the direction of travel of said piston, coil springs interposed between said pistons and said valve members, said iirst and second valve members comprising cup-shaped portions having apertured bases with the piston rod extending through the apertures in said bases, and upstanding flanges, said springs engaging said anges when engaged by said pistons to move said valve members.

3. An oil motor having a body portion including a pair of tubular members, a reciprocable piston rod in said body portion, a valve body coupling said tubular members in axial alignment, said valve body including a substantially centrally disposed inwardly projecting web sealingly engaging said piston rod, said valve body further including axially extending cylindrical walls having portions dening first and second pairs of openings therein in communication with the interior of said tubular members, said first pair of openings disposed on one side of said inwardly extending web and said second pair of openings disposed on the other side of said web, one each of said pairs of openings being fluid inlets, the other of said pairs of openings being tiuid outlets, a pair of substantially cup-shaped valves disposed on opposite sides of said inwardly extending web and in engagement with the inner surface of the axially extending cylindrical walls of said valve body, means interconnecting said valves, said valves including inwardly projecting liange portions dening an opening through which said piston rod may pass, spring means engaging said lianges on each of said valves, pistons on each end of said piston rod adapted to engage said spring means when said piston rod is reciprocated whereby each of said valves is moved simultaneously to allow a flow of fluid through the inlet opening on one side of said inwardly projecting web and a iiow of fluid through the outlet opening on the other side of said web respectively and manifold means secured to said valve body inv overlying relation to each of said pairs of openings in said valve body.

4. An oil motor including a pair of aligned cylinders each having an inlet port in its side wall and a diametrically positioned outlet port in its side wall adjacent the opposed end, a central partition having an axial hole therethrough between said cylinders at their opposed ends, pistons slidably mounted in the respective cylinders, a piston rod connected to said pistons and slidably received in the axial hole in the central partition in close iitting engagement with the latter, cylindrical valve mem bers having inwardly extending iianges slidably mounted in the respective cylinders and surrounding said piston rod, means interconnecting the valve members for converse operation, coiled springs surrounding said piston rod between the respective pistons and the cylindrical valve members, whereby movement of one piston toward the central partition exerts force through the coiled spring on the cylindrical valve member to open the inlet port and close the exhaust port of the respective cylinder and conversely movement of the other piston toward the central partition exerts force through the coiled spring on the cylindrical valve member to open the inlet port and close the exhaust port of the respective cylinder for reversing the direction of travel of the pistons, an oil supply source, means for continuously supplying oil under pressure from the oil supply source to the inlet ports in the cylinders, and means returning oil from the outlet ports in the cylinders to said supply source.

References Cited in the file of this patent UNITED STATES PATENTS 840,886 Wilkins Jan. 8, 1907 1,441,017 Mattson et al Ian. 2, 1923 2,555,018 Von Seggern May 29, 1951 2,618,242 Hutchins Nov. 18, 1952 2,699,153 Russell Jan. 11, 1955 

